Android 4.0, also known as Ice Cream Sandwich (ICS), represented one of the most significant shifts in the history of the Android operating system. It was the version that unified the smartphone and tablet experiences, introducing the "Holo" design language and a host of features we now take for granted. Today, using an Android 4.0 emulator is a trip down memory lane for enthusiasts and a necessary environment for legacy app testing.
If you are looking for lightweight ways to run older Android apps without the heavy setup of Android Studio, these tools are commonly used: Genymotion Android 4.0 Emulator